L-theanine with Suntheanine is an amino acid derived from green tea (produced in Japan) that is responsible for the relaxation-inducing effect of tea consumption.
L-theanine is synthesized in the roots of tea plants and transported to the leaves, comprising about 2% of the total dry weight of green tea leaves. It is the ingredient that is responsible for both the taste and the relaxing effects of green tea.
Suntheanine® has been shown to promote an alert state of relaxation. This is characterized by an increase in alpha brain waves (signifying a relaxed, alert state) and a decrease in beta brain waves (signifying an awake, excited state of mind).
Suntheanine® may also improve sleep quality, enhance mental acuity and soothe away tension and nervousness.
Research shows that supplemental L-theanine crosses the blood-brain barrier within 30 minutes of intake and this is able to exert its effects directly on the brain.